antennas

that will survey a billion

galaxies

that accelerate away from each other. Professor Bryan, Direct of the project, said it would investigate some of the fundamental mysteries of the universe.

What is the nature of the dark matter and dark energy, the stuff that makes up 96% of the universe, and yet the stuff we know very little about. It also looks towards the very early and possibly of the universe of a few hundred thousand years after the big bang and looks at how stars and galaxies are formed from that at

primordial

chaos, and give us new insights into how we came to be our origins.

Vatican police have arrested a man reported to be Pope Benedict's butler and in connection with theft of confidential documents from the Pope's private study. From Rome, here's David Willey.

The string of secret Vatican documents has been systematically leaked to the Italian press in recent months. Last month, Pope Benedict appointed three senior Vatican

cardinals

to carry out investigation into how the documents

fell into wrong hands

. The suspect now being

interrogated

has been named by the Italian media as Paolo Gabriele, the Pope's private butler. They say Vatican police found a stack of secret documents in his home, just inside the walls of the Vatican city state.

This is the world news from the BBC.

With most votes counted after the first round at the presidential election in Egypt, unofficial results suggest the Muslim Brotherhood candidate Mohammed Mursi is ahead. John Leyne reports from Cairo.